Consider two future observatories in space. Observatory X consists of a single 50-metre telescope. Observatory Y is an interferometre consisting of five 10-metre telescopes, spread out over a region 100 metres across. Which observatory can detect dimmer stars, and which one can see more detail in its images

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.